More power. Particularly at altitude.What is the OP's goal?? More power/torque/speed, better MPG, future-proof for parts availability??
Least expensive/quickest?? adding a turbo to a 1FZFE for a bump in power. ($6-7K??)
Most expensive route for uber speed?? Tesla S level EV conversion ($100K+??)
Bit of fabrication involved. How easy is this with diesel adapters gone?
Since I have a RHD fzj I wonder if a 1hdt is easier? If I can get a RHD engine harness from Japan or Australia it should more or less just bolt in yeah? No? I like the sound of a supercharger more and more